A disk array connected to a storage area network via a fiber channel has one or more ports each controlled by a processor. Even the disk array with one port and one processor executes online processing and backup processing at the same time while considering an online processing load. A port controller...http://www.google.com.au/patents/US20020124124?utm_source=gb-gplus-sharePatent US20020124124 - Storage subsystem that connects fibre channel and supports online backup
